649179984 has 40 divisors (see below), whose sum is σ = 1679427232. Its totient is φ = 216086400.

The previous prime is 649179961. The next prime is 649180031. The reversal of 649179984 is 489971946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25959 + ... + 44409.

Almost surely, 2^649179984 is an apocalyptic number.

It is an amenable number.

649179984 is an abundant number, since it is smaller than the sum of its proper divisors (1030247248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649179984 is a wasteful number, since it uses less digits than its factorization.

649179984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19195 (or 19189 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 649179984 is about 25479.0106558320. The cubic root of 649179984 is about 865.8746802925.

The spelling of 649179984 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, nine hundred eighty-four".